Repair manual
Wiring diagrams
Buick Regal III Repair Manual
Step-by-step repair and maintenance instructions for the Buick Regal III (1988–1997): removal, installation, adjustment, diagnostics and parameter checks with illustrations.
- DESCRIPTION
- BLEEDING BRAKE SYSTEM
- Brake Control Assembly
- Brake Cylinder/Caliper
- DIAGNOSIS
- Amber ANTI-LOCK Warning Light
- Red BRAKE Warning Light
- PRE-DIAGNOSTIC INSPECTION
- SNAPSHOT
- ENHANCED DIAGNOSTICS
- INTERMITTENTS
- USING TECH 1
- Selecting Model Year
- Selecting Vehicle
- Selecting Test Mode
- Scan Data Parameters
- Tech 1
- Ignition Cycle Default
- EBCM CONNECTOR ID
- CODE A011 - ABS WARNING INDICATOR OPEN OR SHORTED TO GROUND
- Diagnostic Aids
- CODE A013 - ABS WARNING INDICATOR OPEN OR SHORTED TO BATTERY
- CODE A014 - ENABLE RELAY CONTACTS OR FUSE OPEN
- CODE A015 - ENABLE RELAY CONTACTS SHORTED TO BATTERY
- CODE A016 - ENABLE RELAY COIL CIRCUIT OPEN
- CODE A017 - ENABLE RELAY COIL CIRCUIT SHORTED TO GROUND
- CODE A018 - ENABLE RELAY COIL CIRCUIT SHORTED TO BATTERY
- CODE A021 - LEFT FRONT WHEEL SPEED IS ZERO
- CODE A022 - RIGHT FRONT WHEEL SPEED IS ZERO
- CODE A023 - LEFT REAR WHEEL SPEED IS ZERO
- CODE A024 - RIGHT REAR WHEEL SPEED IS ZERO
- CODE A025 - EXCESSIVE LEFT FRONT WHEEL ACCELERATION
- CODE A026 - EXCESSIVE RIGHT FRONT WHEEL ACCELERATION
- CODE A027 - EXCESSIVE LEFT REAR WHEEL ACCELERATION
- CODE A028 - EXCESSIVE RIGHT REAR WHEEL ACCELERATION
- CODE A031 - TWO WHEEL SPEEDS ARE ZERO
- CODE A032 - LF WHEEL SENSOR SHORTED TO BATTERY OR GROUND
- CODE A033 - RF WHEEL SENSOR SHORTED TO BATTERY OR GROUND
- CODE A034 - LR WHEEL SENSOR SHORTED TO BATTERY OR GROUND
- CODE A035 - RR WHEEL SENSOR SHORTED TO BATTERY OR GROUND
- CODE A036 - SYSTEM VOLTAGE LOW
- CODE A037 - SYSTEM VOLTAGE HIGH
- CODE A038 - LEFT FRONT ESB WILL NOT HOLD MOTOR
- CODE A041 - RIGHT FRONT ESB WILL NOT HOLD MOTOR
- CODE A042 - REAR AXLE ESB WILL NOT HOLD MOTOR
- CODE A044 - LEFT FRONT CHANNEL WILL NOT MOVE
- CODE A045 - RIGHT FRONT CHANNEL WILL NOT MOVE
- CODE A046 - REAR AXLE CHANNEL WILL NOT MOVE
- CODE A047 - LEFT FRONT MOTOR SPINS FREELY
- CODE A048 - RIGHT FRONT MOTOR SPINS FREELY
- CODE A051 - REAR AXLE MOTOR SPINS FREELY
- CODE A052 - LEFT FRONT CHANNEL IN RELEASE TOO LONG
- CODE A053 - RIGHT FRONT CHANNEL IN RELEASE TOO LONG
- CODE A054 - REAR AXLE CHANNEL IN RELEASE TOO LONG
- CODE A055 - MOTOR DRIVER FAULT DETECTED
- CODE A056 - LEFT FRONT MOTOR CIRCUIT OPEN
- CODE A057 - LEFT FRONT MOTOR CIRCUIT SHORTED TO GROUND
- CODE A058 - LF MOTOR CKT SHORTED TO BATTERY OR MOTOR SHORTED
- CODE A061 - RIGHT FRONT MOTOR CIRCUIT OPEN
- CODE A062 - RIGHT FRONT MOTOR CIRCUIT SHORTED TO GROUND
- CODE A063 - RIGHT FRONT MOTOR CIRCUIT SHORTED TO BATTERY
- CODE A064 - REAR AXLE MOTOR CIRCUIT OPEN
- CODE A065 - REAR AXLE MOTOR CIRCUIT SHORTED TO GROUND
- CODE A066 - REAR AXLE MOTOR CKT SHORTED TO BATTERY OR MOTOR
- CODE A076 - LEFT FRONT SOLENOID CIRCUIT OPEN OR SHORTED TO
- CODE A077 - LEFT FRONT SOLENOID CIRCUIT SHORTED TO GROUND OR
- CODE A078 - RIGHT FRONT SOLENOID CIRCUIT OPEN OR SHORTED TO
- CODE A081 - RIGHT FRONT SOLENOID CIRCUIT SHORTED TO GROUND OR
- CODE A082 - CALIBRATION MEMORY FAILURE
- CODE A086 - ABS ENABLE RED BRAKE TELLTALE
- CODE A087 - ABS RED BRAKE TELLTALE CIRCUIT OPEN
- CODE A088 - ABS RED BRAKE TELLTALE CIRCUIT SHORTED TO BATTERY
- CODE A091 - OPEN BRAKE SW CONTACTS (DECELERATION DETECTION)
- CODE A092 - OPEN BRAKE SWITCH CONTACTS (WHEN ABS REQUIRED)
- CODE A093 - CODE 91 OR 92 FAILED IN LAST OR CURRENT IGN CYCLE
- CODE A094 - BRAKE SWITCH CONTACTS ALWAYS CLOSED
- CODE A095 - OPEN BRAKE SWITCH CONTACTS
- CODE A096 - BRAKELIGHT CIRCUIT OPEN
- Removal & Installation
- Removal
- Installation
- WHEEL SPEED SENSOR
- Removal & Installation (Front)
- PARKING/EMERGENCY BRAKE
- STOPLIGHT SWITCH
- WHEEL SPEED SENSORS
- Front Wheel Speed Sensor
- Rear Wheel Speed Sensor
- THM 3T40 APPLICATION
- THM 4L60/700-R4 APPLICATION (1991-92)
- THM 4T60 & 4T60-E APPLICATION (1991-92)
- THM 4L80-E APPLICATION
- THM 4L80-E SERIES CODE DESIGNATION
- MP6 & MP7 APPLICATIONS (1991-92)
- DIAGNOSTIC FLOW
- DESCRIPTION
- TCC CONTROL COMPONENTS
- Brake Switch
- Coolant Temperature Sensor
- Electronic Control Module (ECM)
- TCC Solenoid Assembly
- Throttle Position Sensor (TPS)
- Vacuum Sensor
- Vehicle Speed Sensor (VSS)
- 3rd & 4th Gear Switches
- TROUBLE SHOOTING
- Problem In Electronic Control Module
- Electrical Problems
- Valve Body Assembly
- Oil Pump Assembly
- CONVERTER CLUTCH APPLY SLIPS, ROUGH OR SHUDDERS
- CONVERTER CLUTCH DOES NOT RELEASE
- DIAGNOSTIC TOOLS
- RETRIEVING TROUBLE CODES
- CLEARING TROUBLE CODES (EXCEPT SATURN)
- CLEARING TROUBLE CODES (SATURN)
- ENTERING SELF-DIAGNOSTICS
- EXITING SELF-DIAGNOSTICS
- DISPLAYING TROUBLE CODES
- CLEARING TROUBLE CODES
- SYSTEM SELECTION
- TEST TYPE SELECTION
- CLEAR CODES
- DATA
- INPUTS
- OUTPUTS
- OVERRIDE
- SNAPSHOT
- EXPLANATION OF SPECIFIC TEST SELECTION
- SPECIFIC TEST SELECTION
- BCM Snapshot
- ECM Snapshot
- STATUS LIGHT INDICATORS
- ECM
- HIGH
- MED
- LOW
- OFF or VENT
- Left-Side AUTO
- °C
- Upper Arrow (Icon)
- BCM
- Lower Arrow (Icon)
- TCC LOCK-UP PROBLEMS
- NO LOCK-UP CONDITION
- BRAKE SWITCH TEST
- CHECKING SELF-DIAGNOSTIC SYSTEM
- TCC APPLY SOLENOID TEST
- NO TCC RELEASE CONDITION
- CHECKING VOLTAGE TO TERMINAL "A" AT TRANSMISSION USING ALDL
- CHECKING VOLTAGE TO TERMINAL "A" AT TRANSMISSION
- CHECKING FOR GROUND AT TERMINAL "D" AT TRANS. USING ALDL
- CHECKING FOR GROUND AT TERMINAL "D" AT TRANSMISSION
- COOLER LINE PRESSURE TEST
- ELECTRICAL SWITCHES TEST
- Single Terminal Switch (8642473) & 2 Terminal Switch
- Single Terminal Switch (8642569 & 8634475) & 2 Terminal
- GROUNDING "D" WIRE AT TRANSMISSION USING ALDL
- SELF-DIAGNOSTIC SYSTEM CHECK REATTA & RIVIERA
- Always Start Electrical Or Electronic Diagnosis Here
- Diagnostic Aids
- CHART A-2, SERVICE ENGINE SOON LIGHT WON'T GO OUT OR FLASH (REATTA & RIVIERA)
- CHART B-1, BCM POWER & GROUNDS - REATTA & RIVIERA
- CHART C, ECCP DISPLAY PROBLEMS (LOSS OF ECCP COMMUNICATIONS) (REATTA & RIVIERA)
- CHART D-2, SERIAL DATA CIRCUIT SHORTED TO VOLTAGE - REATTA & RIVIERA
- CHART A-2, SERVICE ENGINE SOON LIGHT WILL NOT GO OUT OR FLASH - TORONADO & TROFEO
- SELF-DIAGNOSTIC SYSTEM CHECK (NON-CRT TORONADO & TROFEO)
- CHART C, LOSS OF ECCP COMMUNICATIONS (NON-CRT EQUIPPED TORONADO & TROFEO)
- CHART D, LOSS OF COMMUNICATIONS (NON-CRT EQUIPPED TORONADO & TROFEO)
- CHART D-2, SERIAL DATA CIRCUIT SHORTED TO VOLTAGE (NON-CRT EQUIPPED TORONADO & TROFEO)
- CHART C, COLOR CRT UNABLE TO CONTROL ECCP (CRT EQUIPPED TORONADO & TROFEO)
- CHART D, SERIAL DATA CIRCUIT OPEN (CRT EQUIPPED TORONADO & TROFEO)
- CHART D-1, GROUNDED SERIAL DATA CIRCUIT (CRT EQUIPPED TORONADO & TROFEO)
- CHART E, COLOR CRT ABNORMALITIES (CRT EQUIPPED TORONADO & TROFEO)
- Note On Intermittents
- CODE 23, MAT SENSOR SIGNAL VOLTAGE HIGH
- CODE 26, DIAGNOSTIC CIRCUIT CHECK
- SERVICE ENGINE SOON LIGHT INOPERATIVE
- SERVICE ENGINE SOON LIGHT WON'T GO OUT OR FLASH CODE 12
- Hot Light Diagnosis
- QDM CIRCUITS
- Hot Light Diagnosis (C Body)
- CODE 27 OR 28, GEAR SWITCH CIRCUITS - 3.3L WITH 3T40 TRANSAXLE
- CODE 28 OR 29, GEAR SWITCH CIRCUITS - 3.3L A BODY WITH 4T60
- CODE 31, PARK/NEUTRAL SWITCH CIRCUIT - 3.3L & 3.8L
- Poor Connection or Damaged Harness
- Intermittent Test
- CODE 39, TCC CIRCUIT 3.3L WITH 3T40 TRANSAXLE
- CODE 39, TCC CIRCUIT 3.3L & 3.8L WITH 4T60 (440-T4) TRANSAXLE
- CHART C-8, TORQUE CONVERTER CLUTCH ELECTRICAL DIAGNOSIS - 3.1L PFI A & J BODIES (2 OF 2)
- 1st Gear
- 2nd Gear
- 3rd Gear
- CHART C-8C, 4T60 TRANSAXLE 1ST GEAR SWITCH ELECTRICAL DIAGNOSIS - 3.4L PFI W BODY
- CHART C-8B, 4T60 TRANSAXLE SHIFT SOLENOID FUNCTIONAL CHECK - 1991 E BODY (EXCEPT ELDORADO) 3.8L PFI (VIN L)
- Transaxle Prefunctional Check
- No Indicator Lights On Or Ignition Indicator Light Only On
- Battery Indicator Light On, All Other Indicator Lights Off
- Brake Indicator Light Not On
- Shift "A" And/Or Shift "B" Indicator lights Not On
- Converter Clutch Apply Indicator Light On All The Time
- Converter Clutch MOD Indicator Light On All the Time
- CHART C-8B, 4T60 TRANSAXLE SHIFT SOLENOID FUNCTIONAL CHECK - 3.8L PFI (VIN L & 1) 1992
- CHART C-8A, TORQUE CONVERTER CLUTCH FUNCTIONAL CHECK - 1992 3.8L PFI (VIN 1)
- CHART C-8B, 4T60 TRANSAXLE SHIFT SOLENOID FUNCTIONAL CHECK - 1992 3.8L PFI (VIN 1)
- Diagnostics Aids
- CODE 23, MAT SENSOR TEMP. LOW - 1991 2.5L & 4.3L TURBO
- CODE 25, MAT SENSOR TEMP. HIGH - 1991 2.5L & 4.3L TURBO
- CODE 25, MAT SENSOR TEMP. HIGH - 1992 2.5L & 4.3L TURBO
- CODE 53, SYSTEM VOLTAGE HIGH - LT. TRUCK
- Notes On Intermittents
- CODE 59, TRANSMISSION TEMPERATURE SENSOR CIRCUIT (LOW TEMPERATURE INDICATED) - LT. TRUCK
- CODE 75, SYSTEM VOLTAGE LOW - LT. TRUCK
- CODE 83, TCC QDM FAULT - LT. TRUCK
- CODE 86, SHIFT SOLENOID "B" STUCK "ON" - LT. TRUCK
- CODE 87, SHIFT SOLENOID "B" STUCK "OFF" - LT. TRUCK
- TORQUE CONVERTER CLUTCH CIRCUIT CHECK - LT. TRUCK
- SHIFT SOLENOID "A" CIRCUIT CHECK - LT. TRUCK
- SHIFT SOLENOID "B" CIRCUIT CHECK - LT. TRUCK
- FORCE MOTOR CIRCUIT CHECK (LT. TRUCK)
- APPLICATION
- IDENTIFICATION
- DESCRIPTION
- LUBRICATION & ADJUSTMENTS
- ON-VEHICLE SERVICE
- VALVE BODY
- DRIVE AXLE SHAFTS
- OIL COOLER FLUSHING
- TROUBLE SHOOTING
- QUICK CHECK
- SYMPTOM DIAGNOSIS
- CLUTCH & BAND APPLICATIONS
- Preliminary
- Gear Selector Position "D4" (Overdrive)
- Garage Shift Check
- Upshifts & Torque Converter Clutch Apply
- Part Throttle Detent Downshift
- Full Throttle Detent Downshift
- Manual Downshift
- Coastdown Downshift
- Manual 3rd "D3"
- Manual 2nd "D2"
- Manual 1st "1"
- Reverse
- HYDRAULIC PRESSURE TESTS
- Minimum Line Pressure Check
- Full Line Pressure
- REMOVAL & INSTALLATION
- INSPECTION
- TRANSAXLE DISASSEMBLY
- TORQUE CONVERTER
- GOVERNOR & MODULATOR
- OIL PAN, FILTER & ACCUMULATOR COVER
- REVERSE & 1-2 SERVOS
- OIL PUMP ASSEMBLY
- CONTROL VALVE ASSEMBLY, SPACER PLATE, GASKETS & CHECK BALLS
- OIL PUMP SHAFT & CHANNEL PLATE
- 4TH CLUTCH SHAFT & CLUTCH PLATES
- OUTPUT SHAFT
- Removable Snap Ring
- Non-Removable Snap Ring
- DRIVE LINK ASSEMBLY
- DRIVEN SPROCKET SUPPORT
- Measure Input Shaft End Play
- Disassembly
- Measure Final Drive End Play
- Inspect
- Disassembly & Reassembly
- COMPONENT DISASSEMBLY & REASSEMBLY
- Cleaning & Inspection
- Reassembly
- Final Drive Pinion Thrust Washer Replacement
- Governor Drive Gear Replacement
- Final Drive Pinion/Side Gears Replacement
- FINAL DRIVE END PLAY MEASUREMENT
- 3rd Roller Clutch
- Input Sprag
- Input Sun Gear
- Reassembly & Functional Check
- Input Shaft Seal Replacement
- Retainer & Ball Assembly Replacement
- Functional Check
- 2nd Clutch Functional Check
- Reassembly For Input Shaft End Play Measurement
- Driven Sprocket Support Bearing Replacement
- Output Shaft W/ Removable Snap Ring
- Output Shaft W/ Non-Removable Snap Ring
- Drive Link Wear Check
- Seal Replacement Procedure
- Axle Oil Seal Replacement
- CONTROL VALVE ASSEMBLY
- Pre-Disassembly Inspection
- Pump Shaft Bearing Replacement
- Reassembly & Adjustment
- Band Apply Pin Selection (1991 Model Only)
- Vacuum Diaphragm Check
- Atmospheric Leak Check
- Load Check
- Sleeve Alignment Check
- TORQUE SPECIFICATIONS